/*
 * Copyright 2011-2012 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package pl.edu.pw.eiti.groupbuying.partner.android.api.impl;

import java.net.URI;

import org.springframework.social.MissingAuthorizationException;
import org.springframework.social.support.URIBuilder;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;

/**
 * @author Roy Clarkson
 */
public class AbstractGroupBuyingOperations {
		
	private final boolean isAuthorized;
	
	private final String apiUrlBase;

	public AbstractGroupBuyingOperations(boolean isAuthorized, String apiUrlBase) {
		this.isAuthorized = isAuthorized;
		this.apiUrlBase = apiUrlBase;
	}
	
	protected void requireAuthorization() {
		if (!isAuthorized) {
			throw new MissingAuthorizationException();
		}
	}
	
	protected URI buildUri(String path) {
		return buildUri(path, EMPTY_PARAMETERS);
	}
	
	protected URI buildUri(String path, String parameterName, String parameterValue) {
		MultiValueMap<String, String> parameters = new LinkedMultiValueMap<String, String>();
		parameters.set(parameterName, parameterValue);
		return buildUri(path, parameters);
	}
	
	protected URI buildUri(String path, MultiValueMap<String, String> parameters) {
		return URIBuilder.fromUri(getApiUrlBase() + path).queryParams(parameters).build();
	}
	
	protected String getApiUrlBase() {
		return apiUrlBase;
	}
	
	private static final LinkedMultiValueMap<String, String> EMPTY_PARAMETERS = new LinkedMultiValueMap<String, String>();
}